Specialized's Power Meter cranks are superbly accurate, with
+/-1.5% accuracy and great ease of setup and use. They've made them
available in this Dura-Ace configuration for those of us who want
to maintain a complete Shimano groupset.
Complete with 52/36T chainrings, these are a simple swap out for
your existing Dura-Ace or compatible crankset, making it easier
than ever to get reliable, accurate power data.
These are dual-sided power cranks, so both legs can be measured
independently for maximum usefulness.
They work with ANT+ and Bluetooth devices, and setup/diagnostics
are made easy with Specialized's Power app (available for iOS and